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Finding the Fourth Proportional to 70,519.95, 105,873.78 and 40,959

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Solution

The fourth proportional to 70,519.95, 105,873.78 and 40,959 is: 61,493.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,519.95 : 105,873.78 = 40,959 : x
  2. Step 2: Convert to fraction form
    70,519.95/105,873.78 = 40,959/x
  3. Step 3: Cross multiply
    70,519.95x = 105,873.78 × 40,959
  4. Step 4: Simplify right side
    70,519.95x = 4,336,484,308.62
  5. Step 5: Solve for x
    x = 4,336,484,308.62/70,519.95
  6. Step 6: Final answer
    x = 61,493.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.